Will be leaving a tour extension of Hiroshima and have an 11:50 am flight to ICN. On a Sunday. And then on to JFK. My ticket is on hold but I don't think I have a better flight option and I need to decide in the next few hours. How early do I need to leave the hotel and do the trains leave that early? Sorry, just started this and haven't had a chance to do any research. Thanks for your help!